The cards you will want to have on your hand are Venser's Journal (This could save your life later on), 1 Steel Overseer (one of the best cards in the deck, just keep tapping its ability to make all your artifact creatures stronger), 1 Pilgrim's Eye or Snapsail Glider. These will get powerful in a few turns if you manage to keep your Steel Overseer. Plus Snapsail Glider will have flying as long as you have three or more artifacts! Flying will really help to get her health down.If she manages to kill all your weaker artifact creatures, one or two Razorfield Rhinos will solve that. Cast the sorcery card 'Sleep' if Chandra has lots of powerful creatures and finish her off with buffed Pilgrim's Eye/Snapsail Glider and Razorfield Rhinos. Rhinos should be at least +6/+6 and if you have two you should be able to finish her in one turn (the turn you cast 'Sleep' of course).